package com.bjc.netty.c4;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.*;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;
import lombok.extern.slf4j.Slf4j;

/**
 * @program: nettypro
 * @description:  outboundhandler
 * @author: bjc
 * @create: 2021-09-24 20:13
 */
@Slf4j
public class TestPipeline2 {

    public static void main(String[] args) {
        new ServerBootstrap()
                .group(new NioEventLoopGroup())
                .channel(NioServerSocketChannel.class)
                .childHandler(new ChannelInitializer<NioSocketChannel>() {
                    @Override
                    protected void initChannel(NioSocketChannel ch) throws Exception {
                        //1.通过channel拿到pipeline
                        ChannelPipeline pipeline = ch.pipeline();
                        //2.添加处理器   这里是双向链表head ->h1 ->h2 ->h3 ->h4 ->h5 ->h6 -> tail
                        pipeline.addLast("h1",new ChannelInboundHandlerAdapter(){
                            @Override
                            public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
                                log.debug("1");
                                super.channelRead(ctx,msg);
                            }
                        });
                        pipeline.addLast("h2",new ChannelInboundHandlerAdapter(){
                            @Override
                            public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
                                log.debug("2");
                                super.channelRead(ctx,msg);
                            }
                        });
                        pipeline.addLast("h4",new ChannelOutboundHandlerAdapter(){
                            @Override
                            public void write(ChannelHandlerContext ctx, Object msg, ChannelPromise promise) throws Exception {
                                log.debug("4");
                                super.write(ctx, msg, promise);
                            }
                        });
                        pipeline.addLast("h3",new ChannelInboundHandlerAdapter(){
                            @Override
                            public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
                                log.debug("3");
                                //这个会往前面的handler找OutboundHandler出栈处理器
                                ctx.writeAndFlush(ctx.alloc().buffer().writeBytes("server...".getBytes()));
//                                ch.writeAndFlush(ctx.alloc().buffer().writeBytes("server...".getBytes()));
                            }
                        });
                        pipeline.addLast("h5",new ChannelOutboundHandlerAdapter(){
                            @Override
                            public void write(ChannelHandlerContext ctx, Object msg, ChannelPromise promise) throws Exception {
                                log.debug("5");
                                super.write(ctx, msg, promise);
                            }
                        });
                        pipeline.addLast("h6",new ChannelOutboundHandlerAdapter(){
                            @Override
                            public void write(ChannelHandlerContext ctx, Object msg, ChannelPromise promise) throws Exception {
                                log.debug("6");
                                super.write(ctx, msg, promise);
                            }
                        });
                    }
                })
                .bind(8080);
    }
}
